From owner-freebsd-stable@FreeBSD.ORG  Sat Jun  9 15:44:20 2012
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From: Ian Lepore <freebsd@damnhippie.dyndns.org>
To: Sami Halabi <sodynet1@gmail.com>
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Date: Sat, 09 Jun 2012 09:43:10 -0600
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Cc: freebsd-stable@freebsd.org
Subject: Re: su problem
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On Sat, 2012-06-09 at 15:47 +0300, Sami Halabi wrote:
> %su -
> Password:
> load: 0.00  cmd: su 30588 [ttydcd] 0.91r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 3.99r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 4.81r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 5.34r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 5.72r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 6.21r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 6.67r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 7.14r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 7.53r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 7.89r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 8.14r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 8.35r 0.00u 0.00s 0% 2092k
> load: 0.00  cmd: su 30588 [ttydcd] 8.53r 0.00u 0.00s 0% 2092k
> 
> 
> Thanks,
> Sami

Since the wait is "ttydcd", try "stty clocal" before doing the "su"
command.  I don't know why su would be waiting for dcd (modem carrier)
but setting clocal mode should eliminate that wait.

-- Ian